687374280 has 48 divisors (see below), whose sum is σ = 2233967580. Its totient is φ = 183299712.

The previous prime is 687374279. The next prime is 687374287. The reversal of 687374280 is 82473786.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 598976676 + 88397604 = 24474^2 + 9402^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (687374287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 954327 + ... + 955046.

Almost surely, 2^687374280 is an apocalyptic number.

687374280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

687374280 is an abundant number, since it is smaller than the sum of its proper divisors (1546593300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687374280 is a wasteful number, since it uses less digits than its factorization.

687374280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909390 (or 1909383 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 687374280 is about 26217.8237083096. The cubic root of 687374280 is about 882.5332823225.

The spelling of 687374280 in words is "six hundred eighty-seven million, three hundred seventy-four thousand, two hundred eighty".